Plumber installed our toilet to the pump??

My plumber installed a new toilet and cistern.
We were unable to flush the toilet properly because we are using a gravity fed system and the water was unable to go into the cistern.
He has now connected the toilet pipe to the pump so when we flush, the pump comes on.
Is this correct?
thanks
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While I dont know your terminogloy lets see. The pump pumps water to the toilet, the toilet needs water to operate, the toilet wasn't working because the tank (cistern)wasn't filling with water, the plumber came and hooked up the pump (water) to the toilet, now the toilet operates.

Is your question to us

"should the pump (water) come on when we flush the toilet"

Do I have all this right? If I do then yes you need pressure to fill the toilet and flushing will lower the pressure and cause the pump to turn on. I have no idea what kinds of pressure settings you may have over there.

The problem is, we just don't understand your plumbing systems. When you say the plumber hooked the toilet to 'the pump,' we don't even know what kind of pump it is or where it is. We do not use cisterns nor do our 'water cylinders' look like yours. Typically, we have either water provided by our city at about 60 lbs. or we have a well with a submersible pump, or an above-ground jet pump. These deliver somewhere in the range of 40-60 or 50 - 70 lbs. of pressure. Our water heaters are an insulated tank with either a gas burner or a set of electric elements. (There are exceptions to these things, but this is what is most common.)

So, in order to answer your questions, we make assumptions. But we're talking past each other. We don't know what kind of pump you have, nor whether it's normal to be hooking toilets or anything else to it, other than possibly the cistern.